An Optimized Data Reporting Protocol for Wireless Sensor Networks

Abstract

Wireless sensor network (WSN) is a wireless network consisting of spatially distributed sensor nodes using to monitor physical or environmental conditions. In many application scenarios, the data collecting element (mobile sink) cannot move freely in the deployed area.In such approaches the mobile sink moves to predetermined sojourn points and query each sensor node individually.A sensor node can conveniently identify its hop count distances to these landmarks. This approach is much more flexible in terms of sinks' movement, but incurs significant control message overheads. SinkTrail is a proactive data reporting protocol that is self-adaptive to various application scenarios, and its improved version SinkTrail-S reduces the control message overheads. In SinkTrail, mobile sinks move continuously in the field in relatively low speed, and gather data on the fly and it establishes a logical coordinate system for routing and forwarding data packets. Each sensor node selects next hop with the shortest logical distance to the mobile sink. The proposed work is based on data collection assisted by mobile sink and to improve energy efficiency, the proposed work introduces a cluster based topology, where data collection will carryout by cluster head to mobile sink. In this approach every sensor node forwards data report to corresponding cluster head, cluster heads then report to mobile sink, which will consume less energy comparatively as well as it will possibly decrease the region travelled by mobile sink.